Fixed cam variable delivery vane pump

Details Fixed cam variable delivery vane pump Fixed cam variable delivery vane pump

1993-02-12

1994-05-31

Bertsch, Richard A.

Pumps

With condition responsive pumped fluid control

Inlet throttle or stop valve

417310, 417440, F04B 4900

Patent

active

053164504

ABSTRACT:
The discharge flow from a rotary vane pump is metered by directing a portion of the pump discharge back into the pump inlet area. A servo controlled actuator apportions the relative amounts of inlet fluid and returns fluid which enters the vane cavities. This arrangement allows for the use of a fixed cam which provides improved pump performance as compared to comparable movable cam pump designs.

REFERENCES:
patent: 3642387 (1972-02-01), Sundberg
patent: 3645652 (1972-02-01), Cygnor
patent: 3650642 (1972-03-01), Cygnor et al.
patent: 3730653 (1973-05-01), Drutchas et al.
patent: 3744939 (1973-07-01), Grennan et al.
patent: 3908360 (1975-09-01), Meyer et al.
patent: 4222712 (1980-09-01), Huber et al.
patent: 4406599 (1983-09-01), Stephan
patent: 4439117 (1984-03-01), Bunger
patent: 4445830 (1984-05-01), Woodruff
patent: 4890986 (1990-01-01), Taguchi et al.
patent: 4892466 (1990-01-01), Taguchi et al.
patent: 5026257 (1991-06-01), Aihara et al.
patent: 5030066 (1991-07-01), Aihara et al.
patent: 5125804 (1992-06-01), Akaike et al.

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